Desk fan



FIG. 1 is a front elevational view of a desk fan showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a perspective view thereof.

The broken lines in the drawings depict parts of the desk fan that formno part of the claimed design.

CLAIM The ornamental design for a desk fan, as shown and described.